▎ 摘　　要

The pursuit of new negative electrode materials for redox supercapacitors with a high capacitance, boosted energy, and high rate capability is still a tremendous challenge. Herein, we report a Nile Blue conjugated graphene aerogel (NB-GA) as a negative electrode material with excellent pseudocapacitive performance (with specific capacitance of up to 483 F g(-)1 at 1 A g(-1)) in all acidic, neutral, and alkaline aqueous electrolytes. The contribution from capacitive charge storage represents 93.4% of the total charge, surpassing the best pseudocapacitors known. To assess the feasibility of NB-GA as a negative electrode material across the full pH range, we fabricated three devices, namely, a symmetric NB-GAIT NB-GA device in an acidic (1.0 M H2SO4) electrolyte, an NB-GA parallel to MnO2 device in a pH-neutral (1.0 M Na2SO4) electrolyte, and an NB-GA parallel to LDH (LDH = Ni-Co-Fe layered double hydroxide) device in an alkaline (1.0 M KOH) electrolyte. The NB-GA parallel to NB-GA device exhibits a maximum specific energy of 22.1 Wh kg(-1) and a specific power of up to 8.1 kW kg(-1); the NB-GAIIMnO2 device displays a maximum specific energy of 55.5 Wh kg(-1) and a specific power of up to 14.9 kW kg(-1), and the NB-GAIILDH device shows a maximum specific energy of 108.5 Wh kg(-1) and a specific power of up to 25.1 kW kg(-1). All the devices maintain excellent stability over 5000 charge-discharge cycles. The outstanding pseudocapacitive performances of the NB-GA nanocomposites render them a highly promising negative electrode material across the entire pH range.